Comparison of the Electrochemical Properties of Hematite Thin Films Prepared by Spray Pyrolysis and Electrodeposition

Ceramics International 2015
Mārtiņš Vanags, Andris Šutka, Jānis Kleperis, Peteris Šipkovs

This manuscrip treports differences between the photoelectrochemical (PEC )activity of hematite (α-Fe2O3) photoanodes produced by cathodic electrodeposition (ED) and spray pyrolysis (SP) methods.Both methods yield nanostructured polycrystalline α-Fe2O3 thin films without additional impurityphases. However, α-Fe2O3 produced by ED is characterised to have better crystallinity and highe rporosity, which was confirmed by XRD and SEM analysis .Owing to this, α-Fe2O3 obtained by ED generates a photocurren tthat is 2.5 times higher than α-Fe2O3 thin films prepared by SP. Furthermore, the influence of the thickness of the α-Fe2O3 thin films on the flat-band potential position wasi nvestigated. Mott–Schottky measurements revealed flat-band potential shift ing to morenegative values, closer to the value of water red-ox potentials, providing the possibility to use these films for efficient water splitting.

Atslēgas vārdi
Hematite; Photoelectrochemical;Thin films; Mott–Schottky
DOI
10.1016/j.ceramint.2015.03.272
Hipersaite
http://www.sciencedirect.com/science/article/pii/S0272884215006884

Vanags, M., Šutka, A., Kleperis, J., Šipkovs, P. Comparison of the Electrochemical Properties of Hematite Thin Films Prepared by Spray Pyrolysis and Electrodeposition. Ceramics International, 2015, Vol.41, Iss.7, 9024.-9029.lpp. ISSN 0272-8842. Pieejams: doi:10.1016/j.ceramint.2015.03.272

Publikācijas valoda
English (en)